php

<?php 

public function get($topic, $specific = null, $param = null)
    {
        if (isset($this->config[$topic])) {
            $value = $this->config[$topic];
        }

        if (! is_null($specific) && isset($value[$specific])) {
            $value = $value[$specific];
        }

        if (! is_null($param) && isset($value[$param])) {
            $value = $value[$param];
        }
        
        return $value;
  }